The authors made an exhaustive study of visceral infarcts (apoplexies) from the clinical point of view. They point out that misinterpretation of symptoms the result of visceral infarctions frequently result in tragedies and loss of life. The clinical entities under discussion tax the diagnostic acumen of both physician and surgeon. The authors' ingenious experiments on lower animals in their approach to a possible solution of the problems presented yielded some interesting conclusions. First, the authors produced anaphylactic shock by artificial means on laboratory animals. From these they were able to conclude that experimentally produced anaphylactic and anaphylactoid shock is followed, essentially, by the same results observed in disturbances of the vegetative nervous system occurring in human beings under similar conditions. Careful comparisons are drawn of the results obtained from animal experimentation with those of clinical patients. While the authors do not claim that their conclusions are final or incontrovertible, their